/* =================================================================== */
//Browser check - better to check for method availability than browsers
var IS_DOM = (document.getElementById) ? true : false;
var IS_IE = (document.all) ? true : false;
var IS_IE50 = (navigator.userAgent.indexOf("IE 5.0") != -1);
var IS_Mac = (navigator.appVersion.indexOf("Mac") != -1);
/* =================================================================== */

// for site specific functions. either grab js from code-library.js or write your own.

// function to add/remove classes from elements
// written by Christian Heilmann 
// more info here http://www.onlinetools.org/articles/unobtrusivejavascript/cssjsseparation.html
// call like cssjs('add',containerOBJ,classname);
function cssjs(a,o,c1,c2){
	switch (a){
		case 'swap':
			o.className=!cssjs('check',o,c1)?o.className.replace(c2,c1):o.className.replace(c1,c2);
		break;
		case 'add':
			if(!cssjs('check',o,c1)){o.className+=o.className?' '+c1:c1;}
		break;
		case 'remove':
			var rep=o.className.match(' '+c1)?' '+c1:c1;
			o.className=o.className.replace(rep,'');
		break;
		case 'check':
			return new RegExp("(^|\\s)" + c1 + "(\\s|$)").test(o.className);
		break;
	}
}

// add a class of "js" to the body tag, to allow for css that gets
// implemented only when js is available
// dependencies: cssjs(), addEvent()
// could change this to the html tag as well pretty easy
function addJSClass () {
	var oBody = document.getElementsByTagName('body')[0];
	if (!oBody) { return; }
	cssjs('add',oBody,'js');
}

// Image Swapping
function changeImages() 
{
  if (document.getElementById) {
    for (var i = 0; i < changeImages.arguments.length; i += 2) { 
  		document.getElementById(changeImages.arguments[i]).src = eval(changeImages.arguments[i + 1] + ".src"); 
	}
  }
}

/* =================================================================== */
// function to add events crossbrowser
// from: http://www.dustindiaz.com/rock-solid-addevent/
// uncomment the EventCache lines if using EventCache function from code lib
function addEvent( obj, type, fn ) {
	if (obj.addEventListener) {
		obj.addEventListener( type, fn, false );
		EventCache.add(obj, type, fn);
	}
	else if (obj.attachEvent) {
		obj["e"+type+fn] = fn;
		obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }
		obj.attachEvent( "on"+type, obj[type+fn] );
		EventCache.add(obj, type, fn);
	}
	else {
		obj["on"+type] = obj["e"+type+fn];
	}
}

// use only with addEvent function
// this is here to clear the event cache to prevent memory leaks
// for more info:  http://novemberborn.net/javascript/event-cache
var EventCache = function(){
	var listEvents = [];
	return {
		listEvents : listEvents,
		add : function(node, sEventName, fHandler){
			listEvents.push(arguments);
		},
		flush : function(){
			var i, item;
			for(i = listEvents.length - 1; i >= 0; i = i - 1){
				item = listEvents[i];
				if(item[0].removeEventListener){
					item[0].removeEventListener(item[1], item[2], item[3]);
				};
				if(item[1].substring(0, 2) != "on"){
					item[1] = "on" + item[1];
				};
				if(item[0].detachEvent){
					item[0].detachEvent(item[1], item[2]);
				};
				item[0][item[1]] = null;
			};
		}
	};
}();
addEvent(window,'unload',EventCache.flush);
/* =================================================================== */

/* =================================================================== */
// various link functionality - popups, external, onstate
// original script taken from Jeremy Keith
// dependencies: cssjs(), addEvent()
var anchors = {
	a : Object,
	doPopups : function() {
		if (!document.getElementsByTagName) { return false; }
		var links = document.getElementsByTagName("a");
		for (var i=0; i < links.length; i++) {
			var anchor = links[i];
		    if (cssjs('check',anchor,'popup')) {
				anchor.onclick = function() {
					return anchors.openWin(this,"toolbar=no");
				};
		    }

		}
	},
	openWin : function(o,params) {
		window.open(o.href, "newwin","" + params + "");
		return false;
	}
};
addEvent(window,'load',anchors.doPopups);
/* =================================================================== */

//For News Popups
function sh_windowpopup(file, name, w, h){
	var xPos, yPos;
	var winProp;    

	xPos = (screen.width/2)-(w/2);
	yPos = (screen.height/2)-(h/2);

	winProp = "width=" + w + ",height=" + h + ",left=" + xPos + ",top=" + yPos +",resizable=1,scrollbars=1";     

	win = window.open(file, name, winProp); 
	win.focus();
}